Because of the headache that doesn't go away no matter how many days I take Penzal I received treatment at the Seoul National University Entrance The One Internal Medicine Clinic. The doctors and nurses are very kind and nice. They ask about my symptoms in detail. He asked about the medication I was currently taking and explained it in detail. I have been taking anticoagulants and high blood pressure medication for 3 years and 1 year, but if the pills don't work, I have to go to a higher level hospital and get a head checkup. I have a referral to a higher level hospital. You're writing I am receiving regular treatment from the cardiovascular and neurology departments at Yangji Hospital, and this time, they said it would be a good idea to get a blood test and a brain examination. If there is a blood clot, it can move to the head and cause a persistent headache. Thank you for explaining in detail.